CO2 Module

In Declaree, you can use the CO2 module, which accurately calculates and records a vehicle's emissions for a mileage declaration. By entering the license plate number, we consult the actual emissions of the journey made via an API at the RDW (Dienst Wegverkeer). This data is easy to export via an export functionality that is part of our Datadump module.
Note: Currently this module only works for vehicles with a Dutch license plate.


How does it work?

When creating a mileage claim, an additional field is visible where the employee enters and saves their license plate number. This license plate is then also visible on their own user profile under "Preferences".

The entered license plate will only be visible to the user themselves. A manager opening the expense will see the license plate censored.

When the report is created, an icon is added under each mileage expense stating "CO2 emissions for this mileage".

How can this data be exported?

The only way to export CO2 emissions is through the Datadump module. To do this, go to Settings > Import & Export > More > Dump > Emissions

Extra information

1. The license plate field will be displayed only for a mileage rate to which the mode of transportation "driving" is associated.

 2. We mainly use the WLTP (Worldwide Harmonized Light Vehicle Test Procedure) value retrieved from the RDW's APIs, and sometimes the NEDC (New European Driving Cycle) value.
There are two procedures for measuring the CO2 emissions of cars. WLTP is the new standard and NEDC is older. Because some cars only have a NEDC value and no WLTP value, we retrieve the WLTP value if it is present. If it is not present, we retrieve the NEDC value.

3. For the other modes of transportation, we use a fixed average value:

  • Biking: 0 g per km
  • Walking: 0 g per km
  • Public transport: 20 g per km (according to data from CO2 emission factors)